42 lines
794 B
Go
42 lines
794 B
Go
// errstr.go -- Error strings when there is no strerror_r.
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package syscall
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import (
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"sync"
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"unsafe"
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)
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//sysnb strerror(errnum int) (buf *byte)
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//strerror(errnum _C_int) *byte
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var errstr_lock sync.Mutex
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func Errstr(errno int) string {
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errstr_lock.Lock()
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bp := strerror(errno)
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b := (*[1000]byte)(unsafe.Pointer(bp))
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i := 0
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for b[i] != 0 {
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i++
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}
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// Lowercase first letter: Bad -> bad, but STREAM -> STREAM.
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var s string
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if i > 1 && 'A' <= b[0] && b[0] <= 'Z' && 'a' <= b[1] && b[1] <= 'z' {
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c := b[0] + 'a' - 'A'
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s = string(c) + string(b[1:i])
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} else {
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s = string(b[:i])
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}
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errstr_lock.Unlock()
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return s
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}
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